Phrase(s): brew something up
1. Lit. to brew something, as in making coffee or tea. • Can somebody brew some coffee up? • Let me brew up a pot of tea, and then we’ll talk. 2. Fig. to cause something to happen; to foment something. • I could see that they were brewing some kind of trouble up. • Don’t brew up any trouble!, Phrase(s): brew up
Fig. to build up; [for something] to begin to build and grow. (Typically said of a storm.) • A bad storm is brewing up in the west. • Something serious is brewing up in the western sky.
McGrawhill's American Idioms And Phrasal Verbs